PVC热氧老化性能研究  

Study on the thermal properties of PVC

作　　者：丁建军[1] 梅一飞[1] 

机构地区：[1]中国建筑材料检验认证中心,北京100024

出　　处：《中国建材科技》2009年第2期34-37,共4页China Building Materials Science & Technology

摘　　要：本文集中研究了热氧老化下PVC分子结构的变化,包括分子主链脱去HCl,形成多烯序列;主链上发生氧化,生成羰基;分子间发生交联或断链反应,平均分子量变化。并采用紫外-可见光谱、傅立叶变换光谱、凝胶渗透色谱对老化后的PVC结构进行了表征,证实了上述变化过程。The structural change of PVC caused by heat and thermal aging, including the formation of polyene sequence from dehydrochlorination of the main chain, carbonyl from oxidation of the main chain, the change of the average molecular weight from crosslinkage or scission of the main chain, is studied in this article. By means of UV- Vis spectrum, FTIR spectrum and GPC, the molecular structure of the aged PVC is characterized, which confirms the changing process above-mentioned.

关 键 词：聚氯乙烯 老化 多烯序列 羰基 分子量 

分 类 号：TQ630.1[化学工程—精细化工]